aec0fb7b40
initializations but we did have lofty goals and big ideals. Adjust to more contemporary circumstances and gain type checking. Replace the entire vop_t frobbing thing with properly typed structures. The only casualty is that we can not add a new VOP_ method with a loadable module. History has not given us reason to belive this would ever be feasible in the the first place. Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc. Give coda correct prototypes and function definitions for all vop_()s. Generate a bit more data from the vnode_if.src file: a struct vop_vector and protype typedefs for all vop methods. Add a new vop_bypass() and make vop_default be a pointer to another struct vop_vector. Remove a lot of vfs_init since vop_vector is ready to use from the compiler. Cast various vop_mumble() to void * with uppercase name, for instance VOP_PANIC, VOP_NULL etc. Implement VCALL() by making vdesc_offset the offsetof() the relevant function pointer in vop_vector. This is disgusting but since the code is generated by a script comparatively safe. The alternative for nullfs etc. would be much worse. Fix up all vnode method vectors to remove casts so they become typesafe. (The bulk of this is generated by scripts)
444 lines
12 KiB
C
444 lines
12 KiB
C
/*
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* Copyright (c) 2000-2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kdb.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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/*#include <vm/vm_page.h>
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#include <vm/vm_object.h>*/
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#include <fs/smbfs/smbfs.h>
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#include <fs/smbfs/smbfs_node.h>
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#include <fs/smbfs/smbfs_subr.h>
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#define SMBFS_NOHASH(smp, hval) (&(smp)->sm_hash[(hval) & (smp)->sm_hashlen])
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#define smbfs_hash_lock(smp, td) lockmgr(&smp->sm_hashlock, LK_EXCLUSIVE, NULL, td)
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#define smbfs_hash_unlock(smp, td) lockmgr(&smp->sm_hashlock, LK_RELEASE, NULL, td)
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extern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */
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MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
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static MALLOC_DEFINE(M_SMBNODENAME, "SMBFS nname", "SMBFS node name");
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int smbfs_hashprint(struct mount *mp);
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#if 0
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_vfs_smbfs);
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#endif
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SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
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NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
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#endif
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#define FNV_32_PRIME ((u_int32_t) 0x01000193UL)
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#define FNV1_32_INIT ((u_int32_t) 33554467UL)
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u_int32_t
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smbfs_hash(const u_char *name, int nmlen)
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{
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u_int32_t v;
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for (v = FNV1_32_INIT; nmlen; name++, nmlen--) {
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v *= FNV_32_PRIME;
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v ^= (u_int32_t)*name;
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}
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return v;
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}
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int
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smbfs_hashprint(struct mount *mp)
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{
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smbnode_hashhead *nhpp;
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struct smbnode *np;
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int i;
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for(i = 0; i <= smp->sm_hashlen; i++) {
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nhpp = &smp->sm_hash[i];
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LIST_FOREACH(np, nhpp, n_hash)
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vprint(NULL, SMBTOV(np));
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}
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return 0;
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}
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static char *
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smbfs_name_alloc(const u_char *name, int nmlen)
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{
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u_char *cp;
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nmlen++;
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#ifdef SMBFS_NAME_DEBUG
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cp = malloc(nmlen + 2 + sizeof(int), M_SMBNODENAME, M_WAITOK);
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*(int*)cp = nmlen;
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cp += sizeof(int);
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cp[0] = 0xfc;
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cp++;
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bcopy(name, cp, nmlen - 1);
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cp[nmlen] = 0xfe;
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#else
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cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK);
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bcopy(name, cp, nmlen - 1);
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#endif
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cp[nmlen - 1] = 0;
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return cp;
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}
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static void
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smbfs_name_free(u_char *name)
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{
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#ifdef SMBFS_NAME_DEBUG
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int nmlen, slen;
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u_char *cp;
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cp = name;
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cp--;
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if (*cp != 0xfc) {
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printf("First byte of name entry '%s' corrupted\n", name);
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kdb_enter("ditto");
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}
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cp -= sizeof(int);
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nmlen = *(int*)cp;
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slen = strlen(name) + 1;
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if (nmlen != slen) {
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printf("Name length mismatch: was %d, now %d name '%s'\n",
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nmlen, slen, name);
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kdb_enter("ditto");
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}
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if (name[nmlen] != 0xfe) {
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printf("Last byte of name entry '%s' corrupted\n", name);
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kdb_enter("ditto");
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}
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free(cp, M_SMBNODENAME);
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#else
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free(name, M_SMBNODENAME);
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#endif
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}
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static int
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smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
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const char *name, int nmlen, struct smbfattr *fap, struct vnode **vpp)
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{
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struct vattr vattr;
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struct thread *td = curthread; /* XXX */
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smbnode_hashhead *nhpp;
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struct smbnode *np, *np2, *dnp;
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struct vnode *vp;
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u_long hashval;
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int error;
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*vpp = NULL;
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if (smp->sm_root != NULL && dvp == NULL) {
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SMBERROR("do not allocate root vnode twice!\n");
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return EINVAL;
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}
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if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
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if (dvp == NULL)
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return EINVAL;
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vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
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error = vget(vp, LK_EXCLUSIVE, td);
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if (error == 0)
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*vpp = vp;
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return error;
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} else if (nmlen == 1 && name[0] == '.') {
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SMBERROR("do not call me with dot!\n");
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return EINVAL;
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}
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dnp = dvp ? VTOSMB(dvp) : NULL;
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if (dnp == NULL && dvp != NULL) {
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vprint("smbfs_node_alloc: dead parent vnode", dvp);
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return EINVAL;
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}
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hashval = smbfs_hash(name, nmlen);
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retry:
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smbfs_hash_lock(smp, td);
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loop:
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nhpp = SMBFS_NOHASH(smp, hashval);
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LIST_FOREACH(np, nhpp, n_hash) {
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vp = SMBTOV(np);
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if (np->n_parent != dvp ||
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np->n_nmlen != nmlen || bcmp(name, np->n_name, nmlen) != 0)
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continue;
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VI_LOCK(vp);
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smbfs_hash_unlock(smp, td);
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if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td) != 0)
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goto retry;
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/* Force cached attributes to be refreshed if stale. */
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(void)VOP_GETATTR(vp, &vattr, td->td_ucred, td);
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/*
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* If the file type on the server is inconsistent with
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* what it was when we created the vnode, kill the
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* bogus vnode now and fall through to the code below
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* to create a new one with the right type.
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*/
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if ((vp->v_type == VDIR && (np->n_dosattr & SMB_FA_DIR) == 0) ||
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(vp->v_type == VREG && (np->n_dosattr & SMB_FA_DIR) != 0)) {
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vput(vp);
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vgone(vp);
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break;
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}
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*vpp = vp;
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return 0;
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}
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smbfs_hash_unlock(smp, td);
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/*
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* If we don't have node attributes, then it is an explicit lookup
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* for an existing vnode.
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*/
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if (fap == NULL)
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return ENOENT;
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MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
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error = getnewvnode("smbfs", mp, &smbfs_vnodeops, &vp);
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if (error) {
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FREE(np, M_SMBNODE);
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return error;
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}
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vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
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bzero(np, sizeof(*np));
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vp->v_data = np;
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np->n_vnode = vp;
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np->n_mount = VFSTOSMBFS(mp);
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np->n_nmlen = nmlen;
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np->n_name = smbfs_name_alloc(name, nmlen);
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np->n_ino = fap->fa_ino;
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if (dvp) {
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ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc");
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np->n_parent = dvp;
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if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) {
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vref(dvp);
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np->n_flag |= NREFPARENT;
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}
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} else if (vp->v_type == VREG)
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SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
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vp->v_vnlock->lk_flags |= LK_CANRECURSE;
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
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smbfs_hash_lock(smp, td);
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LIST_FOREACH(np2, nhpp, n_hash) {
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if (np2->n_parent != dvp ||
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np2->n_nmlen != nmlen || bcmp(name, np2->n_name, nmlen) != 0)
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continue;
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vput(vp);
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/* smb_name_free(np->n_name);
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FREE(np, M_SMBNODE);*/
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goto loop;
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}
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LIST_INSERT_HEAD(nhpp, np, n_hash);
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smbfs_hash_unlock(smp, td);
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*vpp = vp;
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return 0;
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}
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int
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smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
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struct smbfattr *fap, struct vnode **vpp)
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{
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struct smbnode *np;
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struct vnode *vp;
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int error;
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*vpp = NULL;
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error = smbfs_node_alloc(mp, dvp, name, nmlen, fap, &vp);
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if (error)
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return error;
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np = VTOSMB(vp);
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if (fap)
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smbfs_attr_cacheenter(vp, fap);
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*vpp = vp;
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return 0;
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}
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/*
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* Free smbnode, and give vnode back to system
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*/
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int
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smbfs_reclaim(ap)
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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struct thread *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct thread *td = ap->a_td;
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struct vnode *dvp;
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struct smbnode *np = VTOSMB(vp);
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struct smbmount *smp = VTOSMBFS(vp);
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SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp));
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KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim"));
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smbfs_hash_lock(smp, td);
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dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
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np->n_parent : NULL;
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if (np->n_hash.le_prev)
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LIST_REMOVE(np, n_hash);
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if (smp->sm_root == np) {
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SMBVDEBUG("root vnode\n");
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smp->sm_root = NULL;
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}
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vp->v_data = NULL;
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smbfs_hash_unlock(smp, td);
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if (np->n_name)
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smbfs_name_free(np->n_name);
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FREE(np, M_SMBNODE);
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if (dvp != NULL) {
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vrele(dvp);
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/*
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* Indicate that we released something; see comment
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* in smbfs_unmount().
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*/
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smp->sm_didrele = 1;
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}
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return 0;
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}
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int
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smbfs_inactive(ap)
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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struct thread *a_td;
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} */ *ap;
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{
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struct thread *td = ap->a_td;
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struct ucred *cred = td->td_ucred;
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struct vnode *vp = ap->a_vp;
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struct smbnode *np = VTOSMB(vp);
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struct smb_cred scred;
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struct vattr va;
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SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp));
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if ((np->n_flag & NOPEN) != 0) {
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smb_makescred(&scred, td, cred);
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smbfs_vinvalbuf(vp, V_SAVE, cred, td, 1);
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if (vp->v_type == VREG) {
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VOP_GETATTR(vp, &va, cred, td);
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smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
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&np->n_mtime, &scred);
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} else if (vp->v_type == VDIR) {
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if (np->n_dirseq != NULL) {
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smbfs_findclose(np->n_dirseq, &scred);
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np->n_dirseq = NULL;
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}
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}
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np->n_flag &= ~NOPEN;
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smbfs_attr_cacheremove(vp);
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}
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VOP_UNLOCK(vp, 0, td);
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if (np->n_flag & NGONE)
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vrecycle(vp, NULL, td);
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return (0);
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}
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/*
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* routines to maintain vnode attributes cache
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* smbfs_attr_cacheenter: unpack np.i to vattr structure
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*/
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void
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smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
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{
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struct smbnode *np = VTOSMB(vp);
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if (vp->v_type == VREG) {
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if (np->n_size != fap->fa_size) {
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np->n_size = fap->fa_size;
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vnode_pager_setsize(vp, np->n_size);
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}
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} else if (vp->v_type == VDIR) {
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np->n_size = 16384; /* should be a better way ... */
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} else
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return;
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np->n_mtime = fap->fa_mtime;
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np->n_dosattr = fap->fa_attr;
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np->n_attrage = time_second;
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return;
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}
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int
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smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
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{
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struct smbnode *np = VTOSMB(vp);
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struct smbmount *smp = VTOSMBFS(vp);
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int diff;
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diff = time_second - np->n_attrage;
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if (diff > 2) /* XXX should be configurable */
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return ENOENT;
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va->va_type = vp->v_type; /* vnode type (for create) */
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if (vp->v_type == VREG) {
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va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
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} else if (vp->v_type == VDIR) {
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va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */
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} else
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return EINVAL;
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va->va_size = np->n_size;
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va->va_nlink = 1; /* number of references to file */
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va->va_uid = smp->sm_args.uid; /* owner user id */
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va->va_gid = smp->sm_args.gid; /* owner group id */
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va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
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va->va_fileid = np->n_ino; /* file id */
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if (va->va_fileid == 0)
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va->va_fileid = 2;
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va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
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va->va_mtime = np->n_mtime;
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va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
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va->va_gen = VNOVAL; /* generation number of file */
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va->va_flags = 0; /* flags defined for file */
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va->va_rdev = VNOVAL; /* device the special file represents */
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va->va_bytes = va->va_size; /* bytes of disk space held by file */
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va->va_filerev = 0; /* file modification number */
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va->va_vaflags = 0; /* operations flags */
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return 0;
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}
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